growing crisis in Ukraine. The former president who fled the country is expected to speak out as armed troops align with Russia have taken over an airport and government building raising the prospect of civil war. ABC's chief foreign correspondent terry Moran tracking all the breaking developments from Moscow right now and, terry, you see these troops out there at the airport and other government buildings. There is a fear that Russia might get involved. Reporter: Absolutely, George. Good morning to you. What's happened in this whole part of the world today is mysterious and dark and more than a little dangerous as you point out. Around dawn this morning, those bands of uniformed armed troops took over two big airports in the crimeian region where they had that Raef Lucien trying to pull away from Moscow. The people in this crimeian region want to stay close to Moscow of those armed men according to Alex Marquardt, our colleague in that region, no insignias on that uniform, radio, well armed, well organized. There were loomers flying about they might have been sent from Russia. But it seems more likely that they are local cadres coming to the rescue of a region they think is in danger. Definitely trying to send a message. We will hear from the former Ukraine president this morning as he's under threat of a new investigation from Swiss prosecutors. Reporter: Well, this is a man whose gigantic corruption has been exposed for all the world to see. The pictures of his home were disgraceful but he is still the constitutional head of that country, he says, and he is determined to win Russia's backing for a try at power. The situation here is a tinder box. Thanks very much.

This transcript has been automatically generated and may not be 100% accurate.

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